gen 111 intakes.

[PeteH]

so the ls1s and stuff... i was told that the plenum utilizes the oil galley's space and the runners wrap around the top and thats why the engin is so low profile. is this true. it seems like if it were, then the air would heat up in the plenum.
what advantages are the runners giving when configered across like that? short runners give power in the upper rpm ranges but i dont know if those are considered long or short.
..and last but not least...why hasnt anyone come up with a intake manifold combo thats that low pro.. it would look cool if a gen 1 block had the intake the same as the ls1's.

i'm bored.

 

[1979jimmy350]

the ls1 intakes are all plastic, i don't think that they could be put on a older block becasue the intake ports on the new style are so much taller plus, the ls1 intake does not seal off the lifter valley like a old style

 

[sled_dog]

the intake does not go into the lifter valley on a gen III engine. The Gen IIIs have a valley cover, the intake does not block the engine oil from the outside world.

 

[sled_dog]

only cutaway of the intake I can find. You can see the plenum is under the intake runners, but not in the lifter valley. This is an LS2 engine, but its largely the same on the LS1 and LS6 engines.

 

[PeteH]

sweet that pic is just what i was looking for..

oh i wasnt saying use an intake from an LS* but to do something similar.(plen. underneath with runners over the top.)
now i see the bling factor escalating.

hmmnn, looking at that i wouldnt consider those long or short runners.. just medium length. any input?

 

[PeteH]

hmmmn dizzy might get in the way.. sensors could be reconfigured, hmmm..

 

[sled_dog]

its really a similar design to the tuned port, as would your idea be(though tune port has longer runners, I'd say those are more medium).

 

[ryan22re]

the gen III and gen IV have almost the longest runners of them all.

heres some info on runner lengths:

stock tpi 23.375 inches
accel super ram 21.125
stock lt1 9.00
stock ls1 20.00
edelbrock perf rpm
carb style 12.125
edelbrock victor jr
single plane 11.625